A bias most likely be harmful when it accuses a group of beliefs or actions that may not apply to every member.
What is bias?
An excessive weight in support of or against an idea, frequently in a biased, closed-minded, or unfair manner, is known as bias.
When a bias accuses a group of views or acts that may or may not apply to all of its members, it is most often damaging.
Biases can be inherited or acquired. People may develop prejudices in favor of or against a person, viewpoint or a group. A bias is a systematic inaccuracy in science and engineering.
Therefore, option A is correct.
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